Spectral functions in a magnetic field as a probe of spin-charge
separation in a Luttinger liquid

S. Rabello and Q. Si

Department of Physics, Rice University -
Houston, TX 77005-1892, USA

Received:
7
May
2002
Accepted:
26
September
2002

Abstract

We show that the single-particle spectral functions in a magnetic
field can be used to probe spin-charge separation of a Luttinger
liquid. Away from the Fermi momentum, the magnetic field splits
both the spinon peak and holon peak; here the spin-charge
separation nature is reflected in the different magnitude of the
two splittings. At the Fermi momentum, the magnetic field splits
the zero-field peak into four peaks. The feasibility of
experimentally studying this effect is discussed.

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